Boeing 737 Series Aeroplanes
Boeing 737 Series Aeroplanes
Boeing 737 Series Aeroplanes
| AD/B737/298 | Aileron Balance Tab | 13/2006 |
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| Applicability: | All Model 737-100, -200, -200C, -300, -400, -500, -600, -700, -700C, -800, and -900 series aircraft. |
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| Requirement: | Action in accordance with the technical requirements of FAA AD 2006-21-01 Amdt 39-14784.Note: Boeing Special Attention Service Bulletins 737-27-1272 and 737-27-1273, or later FAA approved revisions, refer. |
| Compliance: | As specified in the Requirement document, with a revised effective date of21 December 2006. |
| This Airworthiness Directive becomes effective on 21 December 2006. | |
| Background: | The FAA received reports of freeplay-induced vibration of the aileron balance tab. The potential for vibration of the control surface should be avoided because the point of transition from vibration to divergent flutter is unknown. This Directive requires repetitive measurement of the freeplay of both aileron balance tabs, and repetitive lubrication of the aileron balance tab hinge bearings and rod end bearings. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
7 November 2006